油藏地应力特征在低渗透油田开发设计中的应用

Application of Reservoir Stress Characteristics to Low Permeability Oilfield's Development Design

地应力作用于油藏,对油藏开发全过程均具有十分重要的影响,因此地应力研究是油藏开发过程中的各种工程决策的重要依据,有利于合理布置开发井网、优化压裂设计、定向井和水平井优化设计,有利于充分动用和高效开发新区低渗透油田。他拉哈地区位于大庆油田外围西部,是典型的多油层低渗透油田,该地区影响油气成藏和分布的因素错综复杂,油藏类型和油水关系十分复杂。为搞好勘探开发一体化设计,应用差应变等方法对该地区的地应力特征及应用进行了系统研究与探讨。

Stress can have important influence on oil reservoirs' development, so, relative study becomes key evidence for all kinds of engineering decision. Full consideration of stress can help for reasonable arrangement of well pattern, optimization of fracturing design, optimal design of horizontal wells and directional wells, and effective development of new discovery areas. Tahala area, which is located in the west of marginal regions in Daqing oilfield, is a typical multi layered low permeability field. The influential factors of hydrocarbon formation and distribution, reservoir types and oil-water relationship are complicated in this area. Focusing on personal integrated exploration and development design, systematical research and discussion about the stress characteristics and application in this area are executed based on differential stress change and other methods.